Transfer sheet and sheet assembly



Feb. 16, 1965 E, STRAUSS TRANSFER SHEETv AND SHEET ASSEMBLY 2 Sheets-Sheet l Filed July 9, 1962 FIG. /A

LAYEB INVENTOR. EUC-EN STAHl/Jf l0 CANALS Feb. 16, 1965 l?. sTRAussl 3,159,330

TRANSFER SHEET' AND SHEET ASSEMBLY 2 Sheets-Sheet 2 Filed July 9, 1962,

F/G. 4a F/a 4b INVENTOR. EUG-EN Jrnnuis aiaassa United States Patent Otiice 3,169,880 TRANSFER SHEET AND SEEET ASSEMBLY Eugen Strauss, Via Cassiodoro 20, Milan, Italy Filed July 9, 1962, Ser. No. 208,529 Claims priority, application Italy, lnly 8, 1961, A 14,588/61 32 Claims. (Cl. 117-363) The present invention relates to a copy paper or the like, and more particularly to a paper which can be used for making a plurality of copies without use between the sheets of paper of the well known carbon paper.

The present application is a continuation-in-part of my copending application Serial No. 136,711, filed September 5, 1961, and entitled Copy Paper or the Like, and now abandoned.

Papers are known for making several copies of bills, statements or the like without inserting between the sheets on which the hand or machine written (typewriter for example) notices are placed, carbon paper or the like. Papers of this type in general consist of a sheet; these papers have generally consisted of la writing layer applied to the rear face of a lsheet with the front face of the sheet being adapted to Iaccept lthe writing. By superposing the `rear f-ace of such sheet with the front face of another such sheet and writing on the front face of the first sheet a copy of 4the writing is obtained on the front face of the underlying sheet.

However, the making of several copies without carbon paper using sheets of the type described above involves numerous difficulties which will be further clarified below.

In order to place the problem in its true light it is necessary to shortly describe what the usual carbon paper consists of.

Carbon paper of the known type in general consists of a carrier sheet of paper or the like on the back face of which is placed a writing layer which generally consists of a homogeneous, pasty mass of wax and a black or other colored Writing pigment. By making an impression by means of a typewriter or by hand writing a portion of the writing layer mass on the rear face is carried over to a contacting paper sheet placed in contact with the front face. This Writing process can be repeated several times until the carbon paper is used up and then thrown away.

There are, however, numerous uses, for example in the case of billing, account statements, carbon copy book records and the like in which -a single use of the copy paper is suicient. In these cases the possibility has suggested itself of coating the backside of the original with the mass of the type used for carbon paper so that the sheet lying directly under the origin-a1 can directly receive a copy of what is written or typed on the original.

The use of this process has, however, involved the great difficulty that the hand of the user upon contacting the rear face of the original was dirtied. Many attempts have accordingly been made to solve this problem of dirtying and smearing of the hands.

One of the attempted solutions, which is described in German Patent No. 1,041,981, suggests the coating of the rear face of one sheet with the pigment and coating the front face of the sheet to receive the copy with a wax layer. By writing by hand or with a typewriter the rear face containing the pigment sticks to the front face containing the wax and the corresponding pigment is transferred to the wax layer to effec-t the making of the copy. However, this method also involves various difficulties.

Thus, for example, it is not possible to write on the wax layer of the copy paper on which the layer of color is to be transferred with normal writing means because the wax hinders the deposition of a remaining residue of ink, printing ink or graphite. Furthermore, the obtained copy is not clear and neat, because the taking off of the coloring matter by the waxed side is not clear and sharp and also takes place wit-h some tearing which also makes it qui-te e probable that the wax does not take up the color evenly, particularly in view of the fact that the wax due to various physical factors such as room temperature andhumidity is influenced and changes at various places on' the Furthermore, and of extreme importance, the ob- This is all due to the fact that the coloring matter is not well fixed to the take-up layer.

lt is accordingly a primary object of the present invention to provide a copy paper and a copy paper arrangement which avoids all of the above enumerated ditiiculties.

It is a more particular object of the present invention to provide a copy paper which can be used only a single time for the making of copies, but which can be used for rrli-aking numerous copies all of which are very sharp and c ear.

It is yet another object of the present invention to provide a copy paper which can be handled without any possibility of dirt being transferred from the pigment coated lside of the copy paper to the hands, yor from the hands to the writing side of the copy paper. v

It is yet another object of the present invention to provide a copy paper which is coated on at least one side with a transfer layer, and to provide -a copy paper which is coated on `at least one side with a takeaup layer. In .accordance with the present invention the transfer layer will be taken up substantially only by means of a take-up layer of the type used in accordance with the, invention so that if other sheets of paper are placed in contact with the transfer layer copies will not be made on the other sheet of paper and consequently the pigment in the transfer layer will not -rub off on the hands or on any paper.

It is a further lobject of the present invention toptovide a ycopy paper which has at least one face coated with a special take-up layer for taking up the transfer layer from the rear face of another sheet of copy paper in accord-ance with the present invention, which take up layer, however, can be used and will accept writing from any `other source.

Other objects and advantages of the present invention will be apparentfrom a further reading of the specication and of the appended claims.

With the above and other objects in view, the present invention mainly comprises a copy palper or the like, comprising a carrier sheet provided `on one face thereof with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylrnethacrylate, polycarbonates, polystyrene, polychloroprene, styrenebutadiene copolymers, synthetic cellulose resins, coumarone rosin and coumarone-phenol resins, of at least one;

plasticizrer for the resinoussubstance, of at least one organic fixing agent selected from the group consisting of tannic'acid, gallic acid, digallic acid, salicylic acid,l

phenyl salicyl-ate, 4-butyl-phenyl-salicylate, 5-chloro2 hydroxy-benzophenone, 2,4-dibenzoylJresorcin, phenol phthalic acid, and pyrogallic acid, of at least one inorganic colloidal substance selected from the group consisting of bentonite, kaolin, calcium carbonate, `calcium sulfate,Y calcium phosphate, and zinc oxide, and of a pigment whereby upon the making of an impression lon the opposite face of the carrier sheet cwhen the one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive the transfer layer a portion of the transfer layer corresponding to the 4impression is trans- Patented Feb. 16, 1955 encased ferred to and adheres to the take-up sheet,.thereby making a copy of the impression thereon; I

The present invention' also comprises a copy paper or the like comprising a carrier sheet provided on kone face invention, the same contemplates a copy paper or the like, comprising, in combinati-ou, a carrier sheet on one face thereof; a transfer layer consisting essentially lof a' resinous substance selected from the gnoup consisting of polyvinyl acetate, mixedk polymerisa-tes of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrenebutadiene copolymers, synthetic cellulose resi-ns, coumarone resin :and courna-none-phenol resins, ofV

at least one plasticizer for said resi-nous substance, of at least one organic fixing agent selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenylsalicylate, S-chloro-2-hyduoxy-benzophenone, 2,4-diben zoyl-resorcin, phenol and pyrogallic acid, of at least one Ainorganic colloidal substance selected from the group con-V sisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment; and a take-up layer sensitive to and adapted to receive impressions of the transfer layer, said take-up the present invention to cover the exposed face of theA transfer-layer (in a case Where the same is not covered Y by an adhering take-up layer) with a protective, pigmentcontaining layerrlwhich will not interfere with the transfer of portions of the transfer layer onto lthe takelup layer of Y an underlying sheet. y

.,The'tr'ansfer layer in accordancewithv the presentV inyvention should not have a continuous'ilm so that the separation asa result of typing or writing isV promoted and the mass is soto say partially'transferred to the takeup layer of the other sheet.

layer adhering to the free face of said .transfer layer and consisting essentially of a dried resinous substance selected from the group consisting of acrylic polymers, vinyl polymers, acrylic-vinyl mixed Ipolymers, polyolenes, ethyl cellulose, `benzyl cellulose, methyl cellulose, carboxymethyl cellulose,V polydiolefines, diolefine-styrene mixed polymers, polycarbonates, colophonium copal, abieticmaleic resins and counarone resins, and of fat least one plasticizer in which said resinous Vsubstance is soluble, whereby said take-up layer is adapted to.` receive impressions transferred thcreto from a transfer layer of the type Y described, and whereby said transfer layer when in contact with "a take-up layer of the type described is adapted to transfer :impressions thereto.

It is possible :in accordance with the present invention to have a sheet ofcopy paper in which only the rear face is treated so as to have a transfer layer and in which' the front face is ordinary front face. Of ooursesuch copy sheet could only be used as the original. Y It is also possible in accordance with the present invention to have a copy sheet in which the rear face is not treatedand does not contain a transfer layer but only the front face is treated so as to have a take-up layer. Such copyv paper could only be used for the making of the last'copy.

Y It is also possible in accordance with the present invention to .provide a copy paper lwhich has one face coated with a take-up layer as described above, i.e. the front face, and which has the other face, i.e. the rear face, coated -with a transfer layer `.as described above. `A copy paper Y It is further necessary in accordance with the presentY invention that the transfer layer be dry, but that it adhere suiciently to thecarrier sheet or the like so that the separation of portionstherefrorn can only occur by kan energetic Considerable experimentation has shown Vthat onlyV resinous substances of the type described above. can be used for the formation of the transfer layer in accordance with'thepresent invention. Y Y

The molecular weight ofV the resinous substance may vary within rather wide limits, for yexample. from 10,00() to .as high as 400,000, or more, dependingfon the particular resin. Thus, for example, in the Ycase of polyvinyl acetate the molecular weight may be between 10,000 and 200,000, and is preferably about 60,000. In lthe case of copolymers of polyvinyl chlorideV and polyvinyl acetate the molecular weight is preferably between 10,000 and 30,000 and is preferably about 12,000. The colophonium which is used is the natural resinous substance.

The molecular Weight'of the polymethylacrylate is preferably between 10,000 and 200,000, and most preferably about 60,000, and .the same vapplies with respect to the molecular weight of the polyrnethylmethacrylate The molecular weight of the polycarbonate is preferably Vbetween about 30,000 and 100,000, and most preferably about 70,000, the molecular weight of the polystyrene is preferably between about 10,000 and 150,000, most preferahly'about 50,000, and the molecular weight of the polychloroprene resin is preferably Vbetween about l00,000 and 400,000, and most preferably about 150,000. The most preferred molecular weight of the cumarone resins is about 20,000. Y

In general most of the commercially available resinous substances of the above types may he used for the 'pur-V poses of the present invention. The following list is given Polystyrene:

of this type can be used either as the original, as the lastv n copy, or Ifor intermediate sheets for making copies and for transferring copies.

Furthermore, .according to the present invention, a

in order to help others to readily nd the available cornmercial resinous substances for the purposes of the present invention. Y

Styron-Dow Chemie Company, Midland, Mich. Stiropla'st-Montecatini, Milan, Italy v Polystyrol-BASF., Ludwigshafen (Rhine), Germany Lustron-Monsanto, Springfield, Mass. Polycarbonate:

Lexan-,General'pElectric Co., Pittsfield, Mass. Makrolon-Y-Farbwerke Bayer, Leverkusen, Germany Y Polychloroprene:

Chlortex-Catfaro, Milan, Italy Alloprene-I.C.I, London,.England Y Parlon-Hercules Powder Co.,` Inc., Wilmington Polyvinylchloride-acetate copolymer:

Geon 427-B. F. Goodrich, Cleveland, Ohio Vinylite VYHH-Bakelite Corp. Kreme-*Carbide and Carbon Chemical. Company,

New York Solvic-Solvay, Milan, Italy Polymethylmethacrylate:

Plax methacrylate-Plax Corp., Hartford, Conn. Plexiglas-Rohm & Haas Company, Philadelphia, Pa. Diakon-LCI., Ltd., London Crillat Emulsionen-Montecatini, Milan, Italy Acrysal Emulisionen-Rohm & Haas Company,

Philadelphia, Pa.

The amount of the resinous substance in the transfer layer may vary within wide limits. It is generally maintained in an amount of about 4-20% of the weight of the transfer layer. The most preferred amount will vary depending on the particular resin. Thus, for example, in the case of polyvinyl acetate the amount of resinous substance is preferably between 4-12% of the transfer layer, and most preferably about 5%. In the case of vinylacrylic mixed polymers the amount is preferably between 4-12%, and most preferably about 9%. The amount of phenolcumarone resin is preferably about 6-20%, and most preferably about 10%. The amount of chloroprene is preferably about 6-20% and most preferably'about 12%. In the case of polycarbonate the amount is preferably about 8-12%, and most preferably about 11%. In the case of styrene-butadiene mixed polymers the amount is preferably about 615% and most preferably about 10%. For polyvinyl acetate the amount is preferably 4-12% and most preferably about 7%. For polyvinylchloride-acetate mixed polymers the amount is preferably 8-15% and most preferably about 13%.

The plasticizer for the resinous substance of the transfer layer may be any normal plasticizer for these resinous substances of either the primary or the secondary type. Among the suitable plasticizers may be mentioned castor oil, dibutyl phthalate, dioctylphthalate, diamyl phthalate, tricresyl phosphate, cyclohexyl-p-toluene sulfonamide, dioctyl sebacate, dibutyl stearate, tributyl phosphate, ricinoleic acid, etc. The amount of the plasticizer for the resinous substance in the transfer layer is -generally between 14.5 times the amount of the resinous substance.

The organic fixing agents which are used in the transfer layer of the present invention are preferably present in an amount of between 15 and 90% of the amount of the resinous substance. These organic fixing agents are mainly aromatic substances and their use is of extreme importance for the purposes of the present invention.

By an action which is as yet unexplained, these substances have a protective and fixing action on the transfer layer so that the same obtains the desired dry condition and is anchored securely with the paper carrier or the like. Moreover, these fixing agents have the effect of breaking up the dry transfer layer in mircoscopically small, closely adjacent bodies which are however separate from each other which, as is shown in FIG. 3 of the drawing, are in the form of small, dark or black islands through which marrow, winding canals are separated from yeach other. This is seen by microscopic examination of the transfer layer, and FIG. 3 is -a depiction of a portion of the transfer layer when viewed through a microscope.

This characteristic form which is obtained only by forming a transfer layer in accordance with the present invention is obtained only by the use of the above defined fixing agents, of which tannin is a typical example. This substance has not only the desired fixing and protecting action, but it has the effect of providing for the formation -of these islands which give the discontinuous structure of the transfer layer, and which is due to possibly complicated not easily definable precipitation or coagulation phenomena.

In this connection it should be noted that normal carbon paper when viewed through a microscope has the appearance of a plurality of small bodies extending upwardly from a homogeneous body, the small bodies consisting of carbon black.

The inorganic colloidal substances are present in the transfer layer in accordance with the present invention in an amount of about 1.15 to 1.7 timesthe amount of the resinous substance plus the plasticizer therefor. In other words, for each parts of resinous substance plus plasticiser the transfer layer will contain preferably between about and 170 parts o-f the inorganic colloidal substance.

These inorganic colloidal substances such as bentonite, kaolin, calcium carbonate, gypsum and the like are essential for the formation of the transfer layer. The substances are not only necessary for the formation of a dry, non-dirtying transfer layer, but they are also extremely important for the complete transfer of the layer onto the take-up layer.

The pigments which are used in the transfer layer of the present invention are any of the pigments normally used for carbon paper or other normal copying papers. The most suitable pigment is, of course, carbon black, which is used for black writing papers. Other pigments which may be used are, for example, milori blue, or the like. The amount of carbon black in the transfer layer is generally between about 2.5-20% of the dry weight, the amount depending to some extent on the type of the used carbon black, and also whether it is desired to obtain a grayish or a deep dark image. The most preferred amount of carbon black is about 12% of the dry weight of the transfer layer.

For blue copies it is preferred to use a pigment such as milori blue in an amount of about 10-35% by weight, and preferably in an amount of about 25% by weight.

The carrier sheet on which the transfer layer is located (and also on which a take-up layer may be located) may be of any usual type of carrier sheet. Most preferred is, of course, paper, mainly opaque paper, that is paper filled with titanium white, Zinc white, barite, etc. The percentage content of such fillers in the paper is the normal amount, namely about 8-15% by weight. The amount of filler is lgenerally such that the paper has a pure white color and also that the solution which is -applied to the paper to form the take-up layer does not become absorbed by the paper and color thereby.

It is not necessary to use paper as the carrier sheet, it is also possible to use .plastic foils, such as polyvinyl acetate, polymethylene, mylar, polyester films, etc.

The carrier sheet is preferably of a thickness of about 0.04-08 mm., and most preferably of a thickness of about 0.05 mm. The transfer layer is preferably of a thickness of about 0.005 mm.0.015 mm., and most preferably of a thickness of about 0.01 mm. The take-up layer lis preferably of about the same thickness as the transfer layer, or slightly less.

The take-up layer on the carrier sheet according to the present invention consists essentially of a dried solution 'or suspension of the resinous substances described as suitable for the take-up layer and at least one plasticizer in which the resinous substance is soluble, i.e. a primary plasticizer for the resinous substance. The amount of the primary plasticizer is preferably about 10-5 0% by weight, and most preferably about 25% of the weight of the resinous substance.

The kresinous substances are of the same types as described for the transfer layer and the plasticizer should be a primary plasticizer such as tricresyl phosphate, dioctyl phthalate, dioctyl sebacate, cycloheXyl-p-toluene sulfonamide, etc.

The take-up layer in accordance with the present invention has the property of selectively taking up and receiving an impression from the transfer layer of the present invention.

3,1 sasso In addition, the take-up layer not only is'complementary to and can take up Ithe transfer layer from a sheet of paper carrying the transfer layer, but it can also be written on with any normal writing means such as a typewriter, pen,` pencil, etc., that can be used for any normal type of paper. Y y

The application of the transfer layer and! or the takeup layer tothe carrier material of paper or another'substance such as the plastic film or sheet involves no dificulties and it is not necessary to use any special machines therefor. Thesame machines and rapparatus can be'used as in the production of normal carbon paper. The take-up layer can be applied by known methods on a paper sheet or sheet of a polymeric material, for example:

(a) By means of a coating device with a doctor blade,

(b) by rotation pressure or printing system,

(c) by means of a pressure device with rubber rollers, f

(d) by means of a funnel dosing device under pressure or free flowing, (e) according to the method with reverse rotating rollers (reverse roller),

(i) by means of air or gas spraying devices.

The take-up ylayer can be applied simultaneously with i fthe rolling up of the sheets in the typewriter roller since the number of sheets is of course reduced by the elimination of the carbon paper;

(3) Simple method of production;

(4) Relatively low material costs;

(5) Great degree of -ultziation of the dried and printing dye.

In this connection it should be noted that when making copies using the copy paper of the present invention the fixed corresponding impression made on the front of a sheet of Y paper having a transfer layer on the rear face, the transfer layer being in contact with the take-up layer of another sheet of copy paper, is transferred from the transfer layer to the take-up layer; the transfer is to such extent that when viewing the rear face of the first sheet the same is actually White at the point or points corresponding to v the impression made so that the elfect is achieved that the copy on the take-up layer of -the copy sheet is extremely sharp and distinct, even in the case of numerous copies;

and v (6) The copy paper and the transfer layer thereon can be handled without any danger of dirtying of hands or clothing.l

The novel features which are considered istie for the invention are set forth in particular in the appended claims. The invention itself, however, both -as to its construction and its methodV of operation, together with additional objects and advantages thereof, will Vhe best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

FIG. 1 (comprising FIGS. la, lb and lc) is a diagrammatic, cross sectional illustration of the transfer of copy with copy sheets accordingto one embodiment of the present invention; FIG. 2 (comprising FIGS. 2a and 2b) is a diagrammatic, cross sectional illustration of the transfer of copy using copy sheets in accordance with another embodiment of the present invention',

FIG. 3 is an enlarged View looking down at a portion as characterof a transfer layer in accordance withthe present inyen tion; v

FIG. 4 (comprising FIGS. 4a and 4b) is a cross sectional illustration of the transfer of copy with copy sheets according to another embodiment ofthe present invention; and v Y FIG. 5 is a schematic cross sectional viewA of a transfer sheet according to the present invention which includes a protective layer covering the free face of the transfer layer. Y

Referring more particularly tothe drawings, kand parparticularly to FIG. Vl, a copyrpaper sheet 1, 2 comprising a carrier sheet'l yand a transfer layer 2 is placed ad- Y jacent a copy paper sheet 1, 3 comprising a carrier sheet 1' and a take-up layer 3 against a supporting surface 6 whichV corresponds to .the *rollerV of a typewriter. When Y the typewriter'key 5 strikes `againstV the carrier sheet 1, 2

the transfer layer 2 comes in contact'with the take-up layer I",V and rmly adheres thereto sol as'to form the corresponding impression on the copy sheet 1', 3. y

FIG. 2 illustrates'the making of copy with three copy vsheets in accordance with the present invention. The copy sheet i, Z comprising a carrier sheet 1 and a transfer layer s 2 is placed adjacent a copy sheet 1', 2', 3, Vcomprising a carrier sheet l having on one face thereof a take-up layer 3 and on the other face thereof a transfer layer 2', this sheet 1', 2', 3 being placed between sheet 1, 2 and a copy sheet l, 3 comprising a carrier sheet i and a ,take-.up layer 3". This assembly of three sheetsis placed against a typewriter roller 6 and when the typewriter keys 7 and S strike the firstsheet the corresponding image from the transfer layer 2 adheres to the take-up layer 3 of the intermediate copy sheet l', 2', 3, and the same image 2 is transferred therefrom to the carrier sheet 1", 3" Where it adheres to the take-up layer 3".

FIG. 3 illustrates'that bodies' of transfer layer 9 are separated by canals lil so that thebodies are much like islands. Of course this illustration is greatly enlarged. The effect of the fact that the transfer layer is in the form shown is that the transfer of the image from the transfer layer to a take-up layer is greatly facilitated.

The following examples are given to Vfurther illustrate the present invention. The scope of the invention is not, however, meant to be limited to the speoic details of the examples. The Examples Vl-9 Vrelate particularly to transfer Ylayers and the Examples 1016 relates particu- Y larly to take-up layers in accordance with Vthe present invention. Y Y

Example-1 A solution A is'prepared-from 4 parts of polyvinyl acetate of molecular weight 60,900 and 2 partsv of gallic acid in 44 parts of 94% alcohol as solvent. In a three cylinder ranation machine, there is also prepared in a separate part ofthe machine a paste B consisting of 20% of carbon black, 5% of dioctyl phthalate, 175% of castor oil, V20% of cdciumsulfate, 1,0%'of Zinc oxide, 15% of methyl glycol and 15% of butyl alcohol. Y

The Vralinate portion B is stirred with solution A in a ratio of 50% of paste B and 50% of solution A until a homogeneous copying ink is obtained. The resulting mass is then applied to a carrier sheet, for-example of paper, and dried, It fixes itself to the carrier sheet. The application isvcarriedV out by known methods and the drying and self-fixation can be `carried out by passing a stream 4of air tangentiallyagainst the self-fixing transfer layer applied to the carrier sheet.Y j

Example 2 ymerisate, 0.8 part of tannin, 25.2 parts of ethyl acetate and 19.5 parts of 94% alcohol, and instead of the paste B, a paste D is prepared consisting of V10% of carbon black,

9 of titanium dioxide, 15% of dioctyl sebacate, 30% of calcium sulfate, methyl' glycol and 15% of butyl alcohol.

The final mass consists of 50% of the paste D and 50% of the solution C and the transfer layer is obtained after evaporationV of the solvent.

The presence of titanium dioxide in this example is for the purpose of obtaining a transfer layer with -a less intensive color, that is with :a grayish color instead of a dark black color.

Example 3 A transfer layer composition is prepared as in Example 1 and applied to a carrier upon which it xes itself. Instead of solution A a solution E is prepared consisting of 5 parts of phenol-cumarone resin of molecular weight 20,000, l part `of 5-chloro-2-hydroxybenzophenone and 44 parts of 94% alcohol as solvent. Instead of the paste B a paste F is prepared consisting of of ferrie-ferro-` cyanide (Berlin blue), 30% kaolin,' 10% dioctyl sebacate and 30% of castor oil.

' The final mass of the transfer layer consists of 50% of paste F and 50% of solution E after evaporation of the solvent.

The presence of Berlin blue in the transfer layer of this example is for the purpose of providing blue copies instead of black copies. v

Example 4 Example 5 A dye-containing transfer layer is obtainedV as in Ex-` ample l With a solution I consisting of 5.5 parts of polycarbonate of molecular Weight 70,000, 4.5 parts of 2,4-dibenzoyl resorcinol and 40 parts of methylene chloride. The paste used is paste H of Example 4. The transfer layer is obtained from 50% of solution I and 50% of paste H, is applied to a carrier, dried and fixed.

Example 6 The same procedure is followed as in Example 1 using a solution L consisting of 5 parts of styrene-butadiene mixed polymerisate, 4 parts of salicyclic acid and 4l parts of trichloromethylene and a paste D of Example 2 in a ratio of 50%:50%. The resulting transfer layer is obtained by evaporation of the' solvent.

Example The same procedure as in Example 1 is followed using a solution M consisting of 3.5 parts of polyvinyl acetate, 2 partsof benzoic acid and 44.5 parts of trichloromethylene as well as a paste F of Example 3 in a ratio of 50%:50%. The resulting transfer layer is obtained by evaporation of the solvent.

Example 8 The same procedure is followed as in Example 1 utilizing a solution N consisting of 6.5 parts of a mixed polymerisate of polyvinyl acetate and polyvinyl chloride (molecular Weight 12,000), 2 parts of phenic acid, and 41.5 parts of methylethyl ketone as Well as paste B of Example l, the ratio being 50% :50%. The resulting transfer layer is obtained by evaporation of the solvent.

Example 9 The same procedure is followed as in Example 1 utilizing a solution O consisting of 4 parts of polyvinyl acetate,

3.5 parts of pyrogallic acid and 42.5 parts of trichloromethylene as well as a paste H of Example 4. The ratio used' is 50%:50%. The resulting transfer layer is obtained by evaporation of the solvent.

The take-up layer consists in general of a dispersion orV emulsion or solution in the presence of a plasticizer of a resinous substance of the type described above in connection with the take-up layers in water or a solvent such as alcohols, esters, organic chlorine compounds, ketones, or

the like, which'are evaporated in suitable manner on the carrier to form a very thin, Wax-free layer. These takeup layers have a yselective anity to the above described transfer layers when a local pressure is applied.

` Example 10 A composition is prepared of: 20% of a 5 0% acrylic mixed polymerisate emulsion without plasticizer 40% of 94% alcohol 1% of emulsifying agent (sodium lauryl sulfate) 39% water The solution is prepared by dissolving the mixed polymerisate in the solvent under stirring.

Example 12 A composition for a take-up layer is prepared of 8% polyvinyl acetate v 2% dioctyl phthalate of 94% alcohol The solution is obtained by dissolving the mixed polymerisate in the solvent under stirring.

, Example 13 .Acomposition for a take-up layer'is prepared of: 8% colophonium 5% titanium `dioxide 2% dioctyl sebacate 485% of v94% alcohol The resulting mixture forms a suspension and is obtained bykthorough mixing of the ingredients.

i i Y p Example 14 Y A composition for a take-up layer is prepared of:

v8% Laropal A (derivative of colophonium, B.A.S.F.) 1% tricresyl phosphate 91% trioline The solutionis obtained by stirring the Laropal A (psynld thetic Manila copal) into the solvent.

` Example l15 A composition for a take-up layer is prepared of:

8% `abietomaleic resin 1% tricresyl phosphate 91% trioline V'l`he'solutioniis obtained by stirring the abietomaleic resin Ainto the solvent.

Example 16 A composition for a take-up layer is prepared of:

8% cumarone resin n y92% trioline Y llV v *Y The solution is obtained bydissolving the cumarone resin in the solvent under stirring.

The take-'up layer is prepared, as described above, byk

applying the'composition to a carrier sheet and evaporating the solvent or suspending agent.

According to apreferred embodiment lof the present l invention, and as illustrated in FIG. 4, the ltransfer layer and the take-up layer are arranged on the same face of a carrier sheet.V "This will have the advantage that the sheet 'carrying transfer and take-up-layer on one; face can be used likeva conventional carbon paper, yWillie at Vthe Sametime serving'as the original by typing onto the free facevof thecarrier sheet. Furthermore, the take-up layer exposedon the other .face'of the carrier sheetvwill l `not smudge. Y Y

' Referring now to FIGS. 4a and 4b of the drawing, the copy sheet 41, 42, 43V comprises a carrierV sheet 41, a transfer layer 42 and a take-up layer 43 arranged in the indicated Sequence. A sheet on Whichcopy is to be produced, for instance plain sheet 41r is interposed between roller 46 of the typewriter and copy sheet 41, 42, 43, When typewriterkey 45 strikes carrier sheet 41, an image corresponding to the impressed portion of typewriter key I copy produced on all of them, for instance by applying n the pressure ofaitypewriter key.V The carrier sheet need Y "4,the transfer layer and the take-up layer may be sequen- ',tially applied -to one face of a carrier sheet and a plurality ofk such compositefsheets may then be superposedand not be conventional paper but may be any type of suitable sheet material, for instance a synthetic lm such as cello- 45Will be formed on the free facefof'carrier sheet 41. v

Corresponding portions of transfer layer 42 and take-up layer 43 will'be-transferred to the adjacent face of plain sheet 41' and will form thereon an image consisting, as

illustrated in FIG. 4b, 'of a portion of transfer layer 42 and of take-nplayers 43, the latter beinginterposed between plain sheet 41' and the transferred portion of transfer layer 42.

lt is of course also possible to replace plain sheet 41 with one or more copy sheets 41, 42, 43l so that the 'free faceof the respective carrier sheet is adjacent to the take- `up layer of the superposed copy sheet.

According to a preferred embodiment Vof the present invention, the transfer layer will consist essentially of a v combination or intimate mixture of` a synthetic cellulosev resin, preferably chosen from the group yconsisting of methyl cellulose, benzyl cellulose, ethyl cellulose, nitrof cellulose, diacetylV cellulose and fatty acid esters'of celf lnlose, in combination with a primary softener adapted;V

to dissolve therespective synthetic cellulose resin,.such as Y diethyl phthalate, dibutyl phthalate, dioctyl phthalate and ldioctyl sebacate, and with va secondary softener such as n thesevresins vand preferably chosen from the group consisting of phthalates, phosphates, sebacates, adipates and chlorinated phenol derivatives, plus atleast onel white pigment, preferably titanium dioxide, zinc oxidey or litho- The take-up layer may also consist lof polymerizved -ma 'terial havingV a low meltingpoint such as polyethylene which may have been combined with paran, fatty acids,

i aliphatic alcohols or Aesters-or ramides having oily or waxlike characteristics. Y Y

Within these groups simple pretesting-will show which of the various transfer layers Will give best results @with oney or the other of the take-up layersunder any given conditions; 1 l

FIG. S illustrates the embodimentof the presentinven-k tion, according to which aprotective pigment-containing` vlayer 57 is superposed upon Ytransfer layer' 52 carried by carrier sheet 571. f .y Y y As mentioned further above, in connection with FIG.

Y sheet.

phane or other synthetic sheet material.

f Of thefollowing examples, Examples l7-25 .describing the composition of certain preferred transfer layers accordingto the present invention, Examplesr26-28describe preferred take-up layers, and Example 29 gives a pre-` ferred compositionV of a protective layer such as layer 57 f of'FlG. 5, vvithOut, however; limiting the invention to' the specific details of the examples. f Y

i n Example 17 v y Y A transfer layer is prepared by dissolving 6 parts of ethyl cellulose @14, 48'3/2.ethoxyDv and V2y parts of a fixing agent such as phthalic lacid ortannic acid inr() parts trichloro ethylene andV 32 parts ethanol. l

. The Vthus formed solution VP lis introduced under stirring'into a rened paste Z in a ratio `of 50%,so1ution P and"50% paste Z. f

lPaste yZrconsists of'an intimate mixture of 5% carbon black, V15% kaolin, 25% titanium dioxide, v15%methylglycol, 22% Ycastor oil and 18% dibutyl phthalate.

' ln this manner, a homogeneousV copying ink is obtained which is then applied'to a carrier sheet, for example of paper, and ydried thereon. it fixes itself to .the carrier It will be noted that the manipulative'steps described Y in Example lrarefollowed, however, ywith the different compositions described herein,

' 1 Example 18 The process of Example 17 is followed, however, `solution Z consists of 8% nitrocellulose (710.5% N), 2% taunic acid andy 90%Y ethanol of 94% concentration.

y Forty-eight percent of solution Q are mixedwith 52% f r`of paste Z, the compositionof which hasbeen described vin Example 17. l" 1 Y v L Y Example Y19k Y Fifty percent of solution R consisting 015.6% cellulose acetate (S3-55% Vacetic acid), 1%, phthalic acid and.93% ethyl-acetate are mixedV with 50% of paste Z.'

Example' 20 Fiftyy percent of solution S consisting of 5%- cellulose propionate, 1% phthalic acid and 94%'methylene chlorideare mixed with 50% of paste Z.

Example ZI Forty-eightpercent of solution T consisting of 5%V cellulose 'butyrate, 1%V phthalic acid Yand 94% methylene chloride are mixed Withr52,% of paste Z.

if y y Y K fExamplefQZ Y Y Forty-eight percent of solution U consistingof 5% 4cellulose acetoproprionate, 1% phthalie acid vand* 94% methylene chloride are mixed with 52% of paste Z.

, Example 23gY .Y FiftyV percent of solution V consisting of 6% acetobutyrate` (6 acetyl, 48 butyryl), 1% phthalic acid and 94% methylene Vchloride are mixed with 50% of paste Z. y. Example Y l Y Fifty-two percent of solution W consisting of 7% benzyl cellulose, 1% phthalic acid and 92% methylene chloride are mixed vvith 48% of, paste Z. n

` 'Y Example 25 Y VFifty percent of solutionlX consisting ofY 5% methylv cellulose, 1% tannic acid, -10%`Waterrand 84%' ethanol aremixed with 50%jof paste'Z.v

13 Example 26 A composition for a take-up layer is prepared by melting together 40% of low-melting-point polyethylene, 56% microcrystalline parain and 4% zinc oxide.

Example 27 A composition for a take-up layer is prepared by melting together 70% polyethylene, 20% stearic acid and 10% parain.

Example 28 E A composition which upon evaporation of its volatile constituents will form a take-up layer, is prepared of 40% of an aqueous emulsion of acrylic resin (50% dry substance) 45% ethanol, 10% water and 5% titaniumdioxide.

Example 29 A protective layer, such as layer 57 of FIG. 5, may consist of an intimate mixture of l part by weight of a solution of 9% of a vinyl polymerizate such as is commercially available on the trade name Mowilit K50, Hoechst, and 1% tannic acid in 90% ethanol (94%), with 1 part by weight of a paste consisting of 35% titanium dioxide, 20% methylene glycol, 25% castor oil and 20% dioctyl phthalate.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumaronephenol resins, of an effective amount of at least one plasticizer for said resinous substance, of at least one organic fixing agent in an amount of between about 15-90% of the weight of said resinous substance and selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-Z-hydroxy-benzophenone, 2,4-dibenzoyl-resorcin, phenol and pyrogallic acid, of at least one inorganic colloidal substance in an amount of 1.15- 1.70 times the weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

2. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumaronephenol resins, of an effective amount of at least one plas- .ticizer for said resinous substance, of at least one organic xing agent in an amount of between about 15-90% of the weight of said resinous substance and selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butylphenyl-salicylate, 5-chloro-2-hydroXy-benzophenone, 2,4- dibenzoyl-resorcin, phenol and pyrogallic acid, of at least one inorganic colloidal substance in an amount of l.l5- 1.70 times the weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment, and provided on the other face thereof with a take-up layer sensitive to and adapted to receive impressions of said transfer layer, said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydiolefines, diolene-styrene mixed polymers, polycarbonates, colophonium, copal, abietic-maleic resins and cumarone resins, and of an effective amount of at least one plasticizer in which said resinous substance is soluble, whereby said take-up layer of the type described is adapted to transfer impressions thereto.

3. A sheet assembly composed of two sheets one of which is provided on one face with a transfer layer which is adapted to be placed in face to face Contact with the other sheet which is provided with a take-up layer, said transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins, of an effective amount of at least one plasticizer for said resinous substances, of at least one organic iixing agent in an amount of between about 15- 90% of the weight of said resinous substance and selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-2 hydroxy benzophenone, 2,4-dibenZoyl-resorcin, phenol and pyrogallic acid, of at least one inorganic colloidal substance in an amount of L15-1.70 times the weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment, and said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polyrners, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydiolefines, diolefine-styrene mixed polymers, polycarbonates, colophonium, copal, abietic-maleic resins and cumarone resins, and of an effective amount of at least one plasticizer in which said resinous substance is soluble.

4. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates,` polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumaronephenol resins in an amount of about 4-20% by weight of said transfer layer, of an effective amount of at least one plasticizer for said resinous substance, of at least one organic fixing agent in an amount of between about 15- of the weight of said resinous substance and selected fromthe group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-2 hydroxy benzophenone, 2,4-dibenzoyl-resorcin, phenol and pyrogallic acid, of at least one inorganic colloidal substance in an amount of lL15-1.70 times the Weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate-and zinc oxide, and of a pigment, and

' iii provided on the other face thereofwith a take-up Ylayer sensitive to and adapted to receive impressions of a transfer layer, said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose,

methyl cellulose, carboxymethyl cellulose, polydiolenes,'`

dioleine-st rene mixed ol 'mers noi carbonates, coioa i 'phoniurm copal, abietic-maleic resins and cumarone resins,

and of an effective amount of at leastone plasticizer in which saidv resinous substance is soluble, whereby said take-up layer -is adapted to receive impressions transferred thereto from a transfer layer ofthe type described, `and whereby saidtransfer layer when in contact a taire-np layer of the type described is adapted to transfer impressions thereto. Y

5. A sheet assembly composed of two sheets one of which is provided on one face with a transfer layer which ous substance, of at least one organicV fixing agent in an Y amount of between about l-9tl% of the Weight of said resinous substance and selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-2-hydroxy-benzophenone, ZA-dibenzoyl-resorcin, phenol and pyrogallic acid, of at least one inorganic col- .loidaly substance in an amount of L-4.70 times the Weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment, and said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, Vcarboxymethyl cellulose, polydioleiines, dioleline-styrenemixed polyers, polycarbonates, colophonium, copal, abieticmaleic resins and curnarone resins, and of an effective amount of at least one plasticizer in which said resinous substance is soluble.

6, Acopy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymersates of polyvinyl acetate,rcolophonium, polymethyla'c- -rylate, polyrnethylrnethacrylate, polycarbonates, polystyrene', polychloroprene, styrene-butadiene copolymers, synthet1c cellulose resins, cumarone resin and cumaronev'phenol resins in an amount of about 420% by weight vof said transfer layer, of an efective amount of at least one plasticizer for said resinous substance in an amount of l-4.5 times the amount ofsaid resinous substance, of at least one organic fixing agent in an amount of between about 15-90% of the weight of said resinous substance and selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate,Y 5-chloro-2- hydroxy benzophenone, 2,4 dibenzoyl resorcin, phenol and pyrogallic acid, of at least one inorganic colloidal substance in an amount of L15-1.70 times the Weight of said resinous substance plus said plasticizer and selected fromthe group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium yphosphate and zinc oxide, and of-a pigment, whereby uponthe making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said edades@ Y i@ Y transfer layer a portion of the transfer layer correspond- Ving to said impression is transferred to and adheres to said taire-up sheet, thereby making a copy of said-impression thereon. Y v A 1 7. In a sheet assembly composed of two sheets one of Y which is provided on one face with a transfer layer which is adapted to be placed in face to face contact with the other sheet which is provided with' a tale-up'layer, said transfer layer consisting essentially of aresinous subjstance selected from thev group consisting of polyvinyl acetate', mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, curnarone resin and cumarone-phenol Vresins. in an amount of about L-20%V by weight of said transfer layer, of an effective amount of at least one yplasticizer for said Vresinous substance in an amount of l-4.5 times the amount of said resinous substance, of at least one organic fixing agent in an amount of between about 15-90% Y substance plus said plasticizer and selected from the group consisting of bentonite, lraolin, calcium carbonate, calcium sulfate, calcium phosphateV and zinc` oxide, and of a i pigment, and said take-up layer consisting essentiallyof a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl. cellulose, carboxymethyl cellulose, Ypolydiolenes, dioleine-styrene Vmixed polymers,V polycarbonates, colophonium, copal, ,abietic-male'ic resins and cumarone resins, and of an effective amount of at least one plasticizer in which said resinous substance is soluble;`

8. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, ixed vpolymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethaorylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, curnarone resin and cumarone-phenol resins in an amount of about 4-20% 4 by weight of said transfer layer, of an effective amount of atleast `one plasticizer for said resinous substance in an amount of 154.5 times the amount of said resinous substance, of at least one organic iixing agent in'an amount of between about l5%% of the Weight of said l resinous substance and selected from the group consisting of tannic acid, phtiralic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate,

5chloro-Z-hydroxy-benzophenone, 2,4-dibenzoyl-resorcin, phenol and pyrogallie acid in an amount of l5-90% by weight of the weight of said resinous substance, of at least one' inorganic colloidal substance in an amount of L15-4.70 times the weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, Vcalcium phosphate and zincaoxide, and of a pigment, whereby upon the making of an Vinl,\; ressio n on the' opposite face of saidcarrier sheet when said one face thereof is in contact with a Vface of a take-up sheet sensitive to and adapted to receiye said transfer layer a; portion of the transfer layer corresponding `to said impression 1s transferred to and adheres to said take-up sheet, thereby rmaking a copy of said impression thereon.

9. A copy paper lor the like, comprising a carrier sheet provided on one face thereof with a transfer layer-consisting essentially of a resinous substance selected from -the group consisting of polyvinyl acetate,

polymerisates of polyvinyl acetate, colophonium, polymixed Y l? methylacrylate, poh/me'thylmethacrylate, polycrbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins in an amount of about 4-20% by weight of said transfer layer, of an effective amount of at least one plasticizer for said resinous substance in an amount of l-4.5 times the amount of said resinous substance, of at least one organic xing agent `in an amount of between about l-90% of the weight of said resinous substance and selected from the group consisting of tannic acid, gallic acid, phthalic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-Z-hydroxy-benzophenone, 2,4-dibenzoyl-resorcin, phenol and pyrogallic acid in an amount of l5-90% by weight of the weight of said resinous substance, of at least one inorganic colloidal substance in an amount of l.l5-l.70 times the weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment, and provided on the other face thereof with a take-up layer sensitive to and adapted to receive impressions of a transfer layer, said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydi'olenes, diolefine-styrene mixed polymers, polycarbonates, colophonium, copal, abietic-maleic resins and cumarone resins, and of an effective amount of at least one plasticizer in which said resinous substance is soluble, whereby said take-up layer is adapted to receive impressions transferred thereto from a transfer layer of the type described, and whereby said transfer layer when in contact with a takeup layer of the type described is adapted to transfer impressions thereto.

10. In a sheet assembly composed of two sheets one of which is provided on one face with a transfer layer which is adapted to be placed in face to face Contact with the other sheet which is provided with a take-up layer, said transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrenebutadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins in an amount of about 4-20% by weight of said transfer layer, of at least one plasticizer for said resinous substance in an amount of 1-4.5 times the amount of said resinous substance, of at least one organic fixing agent selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenylsalicylate, 5-chloro-Z-hydroxy-benzophenone, 2,4-dibenzoyl-resorcin, phenol and pyrogallic acid in an amount of l5-90% byweight of the weight of said resinous substance, of at least one inorganic colloidal substance selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of pigment, and said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydiolenes, dioleline-styrene mixed polymers, polycarbonates, colophoniurn, copal, abietic-maleic resins and cumarone resins, and of at least one plasticizer in which sad resinous substance is soluble.

ll. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacry-late, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins in an amount of about 4-20% by weight of said transfer layer, of at least one plasticizer for said resinous substance in an amount of 1 4-.5 times the amount of said resinous substance, of at least one organic fixing agents selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, S-chloro-Z-hydroxy-benzophenone, 2,4-dibenzoyl-resorcin, phenol and pyrogallic acid in an amount of l5-90% by weight of the weight of said resinous substance, of at least one inorganic colloidal substance selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide inan amount of L15-1.70 times the weight of said resinous substance Vplus said plasticizer, and of a pigment, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

l2. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of -a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins in an amount of about 4-20% by Weight of said transfer layer, of at least one plasticizer for said resinous substance in an amount of l-4.5 times the amount of said resinous substance, of at least one organic xing agent selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-2-hydroxy-benzophenone, 2,4-dibenzoyl-resorcin, phenol and pyrogallic acid in an amount of 15-90% by weight of the weight of said resinous substance, of at least one inorganic colloidal substance selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide in an amount of L15-1.70 times the weight of said resinous substance plus said plasticizer, and of a pigment, and provided on the other face thereof with a take-up layer sensitive to and adapted to receive impressions of a transfer layer, said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydioletnes, diolene-styrene mixed polymers, polycarbonates, colophonium, copal, abietic-maleic resins and cumarone resins, and of at least one plasticizer in which said resinous substance is soluble, whereby said take-upV layer is adapted to receive impressions transferred thereto from a tranfer layer of the type described, and whereby said transfer layer when in contact with a take-up layer of the type described is adapted to transfer impressions thereto. v

13. In a sheet assembly composed of two sheets one of which is provided on one face with a transfer layer which is adapted to be placed in face to face contact with the other sheet which is provided with a take-up layer, said transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polstyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins in an amount of about 420% by weight of said transfer layer, of at least one plasticizer for said resinous substance in an amount of 1-4.5 times the amount of said resinous substance, of at least one organic fixing agent selected from -the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-2- hydroxy-benzophenone, 2,4-dibenzoylresorcin, phenol and annesso l@ pyrogallic acid `in an amount of 15-90% by weight of the Weight of said resinous substance, of at least one inorganic colloidal substance selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calsheet provided on one face thereof with a transfer layer consisting essentially of a resinous substance Yselected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates,` polystyrene, polychloroprene, styrene-butadiene copoly-r mers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins in an amount of about 420% by weight of said transfer layer, of at leastoneplasticizer for said resinous substance in an amount of l-l4.5

times the amount of said resinous substance, of at least one organic xing agent selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenylsalicylate, S-chloro-2-hydroXy-benzophenone, 2,4-dibenzoyl-resorcin,` phenol and pyrogallic acid in an amount of l5-90% by'weight of the weight of said resinous sub-- stance, of at least one inorganic colloidal substance selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide in an amount of L-1.70 times the .t

weight of said resinous substance plus said plasticizer, and carbon black in an amount of 2 5-20% by weight ofy the weight of said transfer layer whereby upon the making of an impression on the opposite face of said carrier sheet `when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer a portion of the transfer lay er Vcorresponding to said impression is transferred to and adheres to said taire-upv sheet, thereby making a copy of said impression thereon. 1

15.' A copy paper or the like, comprising a carrierl sheet having a thickness of D04-0.08 mm. and provided on one face thereof with a transfer layer having a thickness of (LOGS-0.015 mm. and consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins, of an t phenol and pyrogallic acid, of at least one inorganic colloidal substance in an amount of L15-1.70 times the weight ofv said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin,

calcium carbonate, calcium sulfate, calcium phosphate` and zinc oxide, and of a pigment, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer a portion of the transfer layer corresponding to said impression -is transferred-to and adheres to said take-up sheet, thereby making acopyrof said iin- Vpression thereon. V i Y 16. In a sheet'V assembly composed of two sheets one of Vwhich is provided on one face with a transfer layer` which isV adapted tobe placed in face to face contact'with the other sheet which is `provided with a take-'up layer, said transfer layer consisting essentiallyV of a resinous substance selected from the= group consistingof polyvinyl acetate, mixed polymerisates of-polyvinyl acetate,V colophonium, polymethylacrylate, polymethylmethacrylate,

polycarbcnates, polystyrene, polychloroprene, styrenebutadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins in an amount of about 4-20% by weight of said transfer Ylayer, of at least one plasticrizer for said resinous substance, of at least one organic fixing agent selected from the group consisting of tannic acid,` phthalic acid, gallic acid, digallicY acid, salicyclic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chloro-Z-hydroxy-benzophenone, 2,4-dibenzoyl-resorcin,

phenol and pyrogallic acid, of'at least V`one inorganic Y colloidal substance selected Afrom the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment, and

VV'said take-up layer consisting essentially of a dried resinous substance selected fromV the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydioienes, dioleiinestyrene mired polymers, polycarbonate's, colophonium, copal, abietic-maleic resins and cumarone resins, and of at least one plasticizer inrwhich said Vresinous substance is soluble in an amount of about l0%`-50% by weight of said resinous substance. f

i7. A copy paper or the'liire, comprisingv a carrier sheet provided on one 'face thereof with a transfer layer consisting essentially of methyl cellulose, of an effective f amount of at least one primary plasticizer for said methyl cellulose, selected from the group consisting of diethyl phthalatedibutyl phthalate, dioctylV phthalate and dioctyl sebacate, of an eiective amount of at least one secondary Y plasticizer selected from the group consisting of castor oil and ricinoleic acid, of at least one organic lixing agent in an amountof between about l5-90% of the weight of said methyl cellulose, of at least one inorganic colloidal' substance in an amount of between about L15-1.70 times the weight of said methyl cellulose plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a dyestulf, whereby upon the making. of an impression on the opposite face of Said carrier sheet when said one face thereof is in contact with a face of atake-up sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding to said impressionis transferred to and adheres to said take-up sheet thereby making a copy of Vsaid impression thereon.

18. AV copy paper or the like, comprising Vacarrier sheet provided on one face thereof with a transfer layer consisting essentially of benzyl cellulose, of an effective amount of at least one Vprimary plasticizer for saidbenzyl cellulose, selected from the group consisting of diethyl phthalate, dibutyl phthalate, dioctyl phthalate and dioctyl sebacate, of an effective amount of'at least one secondary plasticizer selected from the group consisting of* castor Voil and ricinoleic acid, of at least one'organic fixing agent in anV amount of between about lli-% of the weight of said benzyl cellulose, of at leasty one inorganic colloidal substance in an amount of between about 1.l5- 1.70 times the weight of said benzyl cellulose plus said plasticizerand selected from the group consisting of bentonite, `kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a dyestuf, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is 1n contact with ay face of a take-up sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding vto said impression is trans- "spaanse ferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

19. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of ethyl cellulose, of an effective amount of at least one primary plasticizer for said ethyl cellulose, selected from the group consisting of diethyl phthalate, dibutyl phthalate, dioctyl phthalate and dioctyl sebacate, of an effective amount of at least one secondary plasticizer selected from the group consisting of castor oil and ricinoleic acid, of at least one organic fixing agent in an amount of between about l-90% of the weight of said ethyl cellulose, of at least one inorganic colloidal substance in an amount of between about 1.15- 1.70 times the weight of said ethyl cellulose plus said plasticizers and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a dyestuff, whereby upon the making of an impression on the opposite face of .said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making copy of said impression thereon.

20. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of nitrocellulose, of an effective amount of at least one primary plasticizer for said nitrocellulose, selected from the group consisting of diethyl phthalate, dibutyl phthalate, dioctyl phthalate and dioctyl sebacate, of an effective amount of at least one secondary plasticizer selected from the group consisting of castor oil and ricinoleic acid, of at least one organic fixing agent in an amount of between about l5-90% of the weight of said nitrocellulose, of at least one inorganic colloidal substance in an amount of between about L-1.70 times the weight of said nitrocellulose plus said plasticizers and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a dyestuff, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

21. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of diacetyl cellulose, of an effective amount of at least one primary plasticizer for said diacetyl cellulose, selected from the group consisting of diethyl phthalate, dibutyl phthalate, dioctyl phthalate and dioctyl sebacate, of an effective amount of at least one secondary plasticizer selected from the group consisting of castor oil and ricinoleic acid, of at least one organic fixing agent in an amount of between about l5-90% of the weight of said diacetyl cellulose of at least one inorganic colloidal substance in an amount of between about L15-1.70 times the weight of said diacetyl cellulose plus said plasticizers and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a dyestuff, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

22. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of at least one fatty acid ester of cellulose, of an effective amount of at least one primary plasticizerfor said one fatty acid 'ester-of `cellulose, selected from the group consisting of diethyl phthalate, dibutyl phthalate, dioctyl phthalate and dioctyl sebacate, of an effective amount of at least one secondary plasticizer selected from the group consisting of castor oil and ricinoleic acid, of at least one organic fixing agent in an amount of between about l5-90% ofthe weight of said fatty acid ester of cellulose, of at least one inorganic colloidal substance in an amount of between about L15-1.70 times the Weight of said fatty acid esterV of cellulose plus said plasticizers and selected from the group consisting of betonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a dyestuff, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

'23. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer consisting essentially of methyl cellulose, of an effective amount of at least one primary plasticizer for said methyl cellulose, selected from the group consisting of diethyl phthalate, dibutyl phthalate, dioctyl phthalate and dioctyl sebacate, of an effective amount of at least one secondary plasticizer selected from the group consisting of castor oil and ricinoleic acid, of at least one organic fixing agent in an amount of between about 15-90% of the weight of said methyl cellulose, of at least one inorganic -colloidal substance in an amount of between about L15-1.70 times the weight'of said methyl cellulose plus said plasticizers and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a dyestuff; and a protective, pigment-containing layer covering said transfer layer, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of av takeup sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

24. A copy paper or the like, comprising a carrier sheet provided with a transfer layer consisting essentially of a resinous substance selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrenebutadiene copolymers, synthetic cellulose resins, cuma-` rone resin and cumarone-phenol resins, of an effective amount of at least one plasticizer for said resinous substance, of at least one organic fixing agent in an amount of between about 15-90% of the weight ofsaid resinous substance and selected from the group consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 5-chlo'-l ro 2 hydroxy benzopheno-ne, 2,4 dibenzoyl resorcin, phenol and pyrogallic acid, of at least one inorganic colloidal substance in an amount of 4'1.15--1.70 times the weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulphate, calcium phosphate and zinc oxide, and of a pigment, and also provided with a take-up layer sensitive to and adapted to receive impressions of said transfer layer, said take-up layer consisting essentially of a dried resinons substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydiolefines, diolenepolycarbonates, colopho'niurn,y

an effective amount of at least one plasticizer in which said resinous substance is soluble, whereby said take-up Y layer is adapted to receive impressions transferred thereto from a transfer layerV of the type described, yand whereby said transfer layer when in contact with a take-up layer' of the type `described is adapted to transfer impressions thereto. Y v Y 25. A' copy paper or the like, comprising, in combination, a carrier sheet provided on one face' thereof with a transfer layer consistingy essentially of a resinous substance'selected from the group consisting of polyvinyl acetate, mixedpolymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polyrncthylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrenebutadiene copolymers, synthetic cellulose resins, Cumarone resin and cumarone-phenol resins, of an effective amount of at leastV one plasticizer for said resinous substance,`of at least one organic fixing agent inan amount vof between about 15-90% of the weight ofsaid resinous substance and selected from the group 'consisting of tannic acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4-butyl-phenyl-salicylate, 6 chloro 2 hydroxy benzophenone, 2,4 dibenzoylresor'cin, phenolA andpyrogallic acid, of at least one inorganic colloidal substance in an amount of L15-1.70 times the weight of said resinous substance plus said plasticizer and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium'phosphate and zinc oxide, and of a pigment; and a take-up la-yer sensitive toand adapted to receive impressions of said transfer layer, said take-up layer adhering'to the free face of said transfer layer and consisting essentially. of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose,

benzyl cellulose, methyl cellulose, carboxyr'nethyl cellulose, polydioletines, diolene-styrene mixed polymers, polycarbonates, colophonium, copaLVabietic-maleic resins and cumarone resins, and of an effective amount of at least one plasticizer in'which said resinous substance is solu-V ble, whereby said take-up layer is-adapted to receive imhaving a thick.ness of 0.005-O.l5 mm. and consisting essentially of a resinous substance maintained in an amount of between about 4-20% by weight of said transfer layer, said resinous substance being selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinylr acetate, colophonim, polymethylmethacrylate, polymethylacrylate, polycarbonates, polystyrene, polychloroprene, synthetic cellulose resins, cumaron resin and cumaronphenol resins, of at least one plasticizer for said resinous substance'maintainedV in an amount of l'-4.5 times the amount of said resinous substance, said plasticizer being selected from the group consisting of castor oil, dibutyl phthalate, dioctyl phthalate, diamyl phthalate, tricresyl phosphate, cyclohexyl-p-toluene sulfonamide, dioctyl sebacate, dibutyl stearate, tributyl phosphate and .ricinoleic acid, of at least one organic fixing agent in an amount of between l5-9.0% of the amount of said resinous substance, said organic fixing agent beingselected from the group consisting of trannie acid, phthalic acid, gallic acid, digallic acid, salicylic acid, phenyl salicylate, 4 butyl phenyl salicylate, 5 chloro 2 hydroxybenzophenone, 2,4-dibenzoyl-resorcine, phenol andpyrogallic acid, of at least one inorganicV colloidal substance present in an amount of between about L15-1.70 times th'e amount of said resinous substanceplus said plastitransfer layer a portion of the transfer layer correspond-` ing to said impression is transferred to and adheres toY said take-up sheet, thereby making a copy of said impres-Y sion thereon. Y Y f 27. A copy paper or the like, comprising a carrier sheet styrene-butadiene copolymers, g

cizer therefor and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium Y sulfate, calcium phosphate and Zinc oxide, and of a pigment in an amountV of between 2.5-20% by weight of the weight of said transfer layer, whereby upon thetmakin'gfof kan impression on the opposite face of said4 carrier vsheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said provided on one face thereof with a transfer layer having a thickness of {MO5-0.015 mm. and consisting Vessentially of a resinous substance maintained in an amount of between about 4-20% by weight of said transfer layer, satidlresinous substance being selected from the Vgroup consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophonium, polymethylme-thacrylate, polymethyiacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins,

of at ieast one plasticizer for said resinous substance maintained-in` an amount of lbetween l}-4.5 times the amount of saidresinous substance, said plasticizer being Y Vacid,'of at leastrone organic fixing agent present in an amount of between l5-90%V of the amountrof said resinous substance, said organic fixing agent being selected from the group consisting of tannic acid, phthalicfacid, gallic acid, digaliic acid, salicylic acid, phenyl sal-icyiate, 4- butylphenyl-salicylate,V 5-chloro-Z-hydroxy-benzophenone, 2,4-di-benzoyl-resorcin, phenol and pyrogallic acid, of

at leas-t one inorganic colloidal substance present in anV amountrofV between about L15-1.70 times the amount 'of said resinous substance plusV said plasticizer therefor and selected Vfrom theV group consisting of bentonite, kaolin, calciumvcarbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment in an amounty of between 2 5-20% by Weight of theweight of said transfer layer and provided on the other face thereof with a take-up layersensitive to and adapted to receive impressions of said transfer layer, said 'take-up layer consisting essentially of a'dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxyrnethyl cellulose, polydiolefnes, diolefine-styrenemixed polymers, polycarbonate, colophonium, copal, abietiic-maleic resins and cumarone res-ins, and of atleast one plasticizer maintained in anamo'unt-of between l050% by `weight of said resinous substance and selected from the group of primary plasticizers consisting of-tricresyl phosphate, diocftyl phthalate, dio'ctyl sebacate and cycloheXyl-p-toluene sulfonarnide, in which said resinous substance is soluble, whereby said Vtake-upV layer of the type described is adapted to accept impressions formed Vof said transfer layer.

28. A sheet' assembly composed of two sheets one of which is provided on one face with a transfer layer having a thickness ofbetween (MO5-0.015 mm., and'which is adapted to be placed in face to face contact with the other sheet Which is provided with atake-up layer, said transfer layer consisting essentially of a reszinous substance maintained in an amount of between about 4-2i)% by weight of said transfer layer, said resinous substance being selected from the group consisting of polyvinyl acetate, mixed polymerisates of polyvinyl acetate, colophoniurn, polymethylmethacrylate,` poly-methylacrylate, polycarbonates, polystyrene, polychloroprene, styrenebutadiene copolymers, synthetic cellulose resins, curnarone resin and cumarone-phenol resins, of at least one plasticizer for said resinous substance maintained in an amount ofV ein "z between 1-4.5 times the amountV of said resinous subi stance and selected from the group consisting of castor otil, dibutyl phthalate, dioctyl phthalate, diamyl phthalate,

tricresyl phosphate, cycloheXyl-p-toluene sulfonamide, di

octyl sebacate, dib-utyl stearate, tributyl phosphate and ricinoleic acid, of at least one organic fixing agent present inan amount of between about 15-90% of the amountA siofssaid resinous substance and selected from the group Vconsisting of tannic acid, phthalic acid, gallic acid, diglic acid, salicylic acid, phenyl salicylate, 4-butylphenyl salicylate, 5-cbloro-Z-hydroXy-benzophenone, 2,4- dibenzoyl-resorcin, phenol, and pyrogallic acid, of at least one inorganic colloidal substance present ,in an amount of between about 1.1)5 to 1.70 times the amount of said resinous substance plus said plasticizer therefor and selected from Ithe group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment in an amount of between 2.5-20% by weight of the weight of said transfer layer, and said take-up layer, consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydiolens, dioletine-styrene mixed polymers, polycarbonates, colophonium, copal, abietic-maleic resins and cumarone resins, and of at least one plasticizer maintained in an amount of between about l050% by weight of said resinous substance and selected from the group of primary plasticizers consisting of tricresyl phosphate, dioctyl phthalate, dioctyl sebacate and cyclohexyl-p-toluene sulfonamide, in which said resinous substance is soluble.

29. A copy paper or the like, comprising a carrier sheet providedon one face thereof with a transfer layer having a thickness of between about 0.005-0.015 mm.

and consisting essentially of a'resinous substance maintained in an amount of between about 4-20% by weight of said transfer layer, said resinous substance being selected from the group consisting of methyl cellulose, benzyl cellulose, ethyl cellulose, nitrocellulose, diacetyl cellulose and fatty acid ester of cellulose, of at least one primary plasticizer for said resinous substance present in an amount of between about 14.5 .times the amount of said resinous substance, said primary plasticizer being selected from the group consisting of diethyl phthalate, dibutyl phthalate, dioctyl phthalate, and dioctyl se'bacate, of at least one secondary plasticizer selected from the group consisting of castor oil and ricinoleic acid in an amount of between about 14.5 times the amount of said resinous substance, of at least one inorganic colloidal substance present in an amount of about L-1.70 times the amount of said resinous substance plus said plasticizer therefor and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and a dyestuff in an amount of 2.540% by weight of the weight of said transfer layer, whereby upon the making of an impression on the opposite face of said carrier sheet when said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said transfer layer, a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of said impression thereon.

30. A copy paper or the like, comprising a carrier sheet provided on one face thereof with a transfer layer having a thickness of 0.005-0.l5 mm. and consisting essentially of a resinous substance maintained in an amount of between about 4-20% by weight of said transfer layer and Ibeing selected from the group consisting of methyl cellulose, benzyl cellulose, ethyl cellulose, nitrocellulose, diacetyl cellulose and fatty acid ester of cellulose, of at least one primary plasticizer for said resinous substance present in an amount of between about 14.5 times the amount of said resinous substance selected from the group consisting of diethylphthalate, di-

26 butyl phthalate, dioctyl phthalate and dioctyl sebacate, 0f at least one secondary plasticizer selected from the group consisting of castor oil and ricinoleic acid in an amount of 1-4.5 times the amount of said resinous substance, of at least one inorganic colloidal substance present in an amount of between about 1.15 to 1.70 times the amount of said resinous substance plus said plasticizer therefor and selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, cal-r cium phosphate and zinc oxide, and of a dyestutf in an amount of 2 5-20% by weight of the weight of said transfer layer; and a protective, pigment-containing layer covering said transfer layer, whereby upon the making of an impression on the opposite face of said carrier sheet Iwhen said one face thereof is in contact with a face of a take-up sheet sensitive to and adapted to receive said trans-fer layer, a portion of the transfer layer corresponding to said impression is transferred to and adheres to said take-up sheet, thereby making a copy of vsaid impression thereon.

31. A copy paper or the like, comprising a carrier sheet provided with a transfer layer having a thickness of between about 0.005-0.15 mm. and consisting essentially of a resinous substance maintained in an amount of between about 4-20% by weight of said transfer layer and selected from the group consisting of polyvinyl acetate, mixed polymeri'sates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polychloroprene, polystyrene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins, of at least one plasticizer for said resinous substance maintained in an amount of l-4.5 times the amount of said resinous substance and selected from the group consisting of castor oil, dibutyl phthalate, dioctyl phthalate, diamyl phthalate, tricresyl phosphate, cycloheXyl-p-toluene sulfonamide, dioctyl -sebacate, dibutyl stearate, tributyl phosphate and ricinoleic acid, of at least one organic fixing agent preferably present in an amount of between l5-90% of the amount of said resinous substance and selected from the group consisting of taunic acid, phthalic acid, gallic acid, digallic acid, salicyclic acid, phenyl salicyclate, 4butyl phenyl salicyclate, 5-chloro-2 -hydroxy-benzophenone, 2,4-dibenzoy1 resorcin, phenol and pyrogallic acid, of at least one inorganic substance present in an amount of about L15-1,70 times the amount of said resinous substance plus said plasticizer therefor selected from the group consisting of bentonite, kaolin, calcium carbonate, calcium sulfate, calcium phosphate and zinc oxide, and of a pigment in an amount of 2.5-20% by weight of the weight of said transfer layer, and also provided with a take-up layer sensitive to and adapted to receive impressions of said transfer layer, said take-up layer consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl cellulose, benzyl cellulose, methyl cellulose, carboxymethyl cellulose, polydiolefnes, dioletine-styrene mixed polymers, polycarbonates, colophonium, copal, a'bietic-maleic resins and cumarone resins, and at least one plasticizer in which said resinous substance is soluble maintained in an amount of about 10-50% by weight of said resin-ous substance and selected from the group of primary plasticizers consisting of tricresyl phosphate, dioctyl phthalate, dioctyl sebacate and cyclohexyl-p-toluene sulfonamide, whereby said .take-up layer is adapted to receive impressions transferred thereto from a transfer layer of the type described, and whereby said transfer layer when in contact with a take-up layer of the type described is adapted to transfer impressions thereto.

32. A copy paper or the like, comprising, in combination, Va carrier sheet having on one face thereof; a transfer layer having a thickness of 0.005-0.0l5 mm. and consisting of a resinous substance maintained in an amount of about 4-20% by weight of said transfer layer and selected from the group consisting of polyvinyl ace- 3,169,1ssol tate, mixedv polymerisates of polyvinyl acetate, colophonium, polymethylacrylate, polymethylmethacrylate, polycarbonates, polystyrene, polychloroprene, styrene-butadiene copolymers, synthetic cellulose resins, cumarone resin and cumarone-phenol resins, of at least one plastiand selected from the group consisting ofl castor oil, dibutyl phthalate, dioctyl phthalate, diamyl phthalate, tricresyl phosphate, cycloheXyl-ptoluene `sulfonamide,'d

octyl sebacate, dibutyl stearate, tributylrphosphate and ricinoleic acid, of at least one organic xing agent preferably present in an amount of between 15-90% of the amount of said resinous substance selected Vfrom the group consisting of ltannic acid, vphthalic acid, gellio acid, digallic acid, salicylic acid, Vphenyl salicylate, 4-

f ceive impressions of said transfer layer, said take-up f layer adhering'to the free face of said transfer layer and consisting essentially of a dried resinous substance selected from the group consisting of vinyl polymers, ethyl ce1-V lulose, benzyl cellulose, methyl cellulose, carboxy-methyl cellulose, polydiolenes, diolene-styrene mixed polymers, polycarbonates, colophonium, copal, abietic-maleic resins and curnarone resins, and of at least one plasticizer in which. said resinous substance is vsoluble maintained in an amount of between about lO-50% by Weight of said resinous substance and selected from the group of primary plasticizers consisting of tricresyl phosphate,

dioctyl phthalate, dioctyl sebacate Vand cycloheXyl-ptolcizer for said resinous substance maintained in an amount of 1-4.5 times the amount Vof, said resinous substance uene sulfonamide, whereby said take-up layer is adapted to receive impressions transferred`V thereto from' a transfer layer of the type described, and' whereby. said transfer layerwhen in` Contact with a take-up layerjof the type described is adapted to transfer impressions thereto;

References Cited by the Examiner l UNITED STATES PATENTS 2,146,619Y VV2/39 Bowlby 117-157 2,398,042 Y4/46- ,Salo 117-157 2,554,652l ',5/51 Cowgill v 117,-155 2,788,340". 4/57. Dannels 117,-155 2,800,077 Y7/57 Marron 117-,36.1 2,820,717 1/58 Newman et al, --..Q l117--36.1 2,872,340 2/59 Newman et al. V lll-36.1 2,893,890 V7/59V Harvey 2 117-361 2,943,952 7/60 Clark i.- V117-361 2,944,037 7/60 v Clark V f 117 36.`1 Y 2,984,342 5/61 .Smith l1177-4155 2,984,582 5/61y Newman et al. 11T-@36.4 2,989,493, 6/61 Clark et al. 1 l17--36.1.v 3,037,879 Y 6/62 Newmanset al. 11T-36.1

Y FOREIGN PATENTS 392,220 5/ 33 Great Britain.

RICHARD NEVUS, Primary Examiner. MURRAY KATZ, Examiner.

y can,

UNITED STATES PATENT OFFICE C, CERTIFICATE OF CORRECTION Patent No. 3,169,880 February l6, 1965 Eugen Strauss It is hereby certified that error appears in the above numbered patent requiring correction and thatv the said Letters` Patent should read as corrected below.

In the drawings, Sheet "2, in FI 4a correct reference .numerals Z,v 3j 5, and 6 to read, respectively, 42 43 ,i 45 and 46;

correct reference numeral l as it appears in the left-hand portion of PIG. 4a to read 4l; correct re-erence numeral l as it appears adjacent to element 6 to read 4l; in PIG. 4b correct reference numerals l, l", 2, 3, 5, yand 6 to read, respectively, 4l, 4l 4Z, 43, 45 and 46; in FIG. 5 correct reference numerals l, Z and 7 to read, respectively, 5l, 52

and 57; in the legend correct reference numerals l, l to read 4l, 4l", 5l; correct reference numeral 2 to read 4Z, 52; correct reference numeral 3 to read 43; correct reference numeral 5 to read 45; correct reference numeral 6 to read 46; correct reference numeral 7 to read 47, 57.

Signed and sealed this 26th day of April 1966.

l(SEAL) Attest:

ERNEST W. SWIDER EDWARD J.4 BRENNER Attesting Officer Commissioner of Patents 

2. A COPY PAPER OR THE LIKE, COMPRISING A CARRIER SHEET PROVIDED ON ONE FACE THEREOF WITH A TRANSFER LAYER CONSISTING ESSENTIALLY OF A RESINOUS SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACETATE, MIXED POLYMERISATES OF POLYVINYL ACETATE, COLOPHONIUM, POLYMETHYLACRYLATE, POLYMETHYLMETHACRYLATE, POLYCARBONATES, POLYSTYRENE, POLYCHLOROPRENE, STYRENE-BUTADIENE COPOLYMERS, SYNTHETIC CELLULOSE RESINS, CUMARONE RESIN AND CUMARONEPHENOL RESINS, OF AN EFFECTIVE AMOUNT OF AT LEAST ONE PLASTICIZER FOR SAID RESINOUS SUBSTANCE, OF AT LEAST ONE ORGANIC FIXING AGENT IN AN AMOUNT OF BETWEEN ABOUT 15-90% OF THE WEIGHT OF SAID RESINOUS SUBSTANCE AND SELECTED FROM THE GROUP CONSISTING OF TANNIC ACID, PHTHALIC ACID, GALLIC ACID, DIGALLIC ACID, SALICYLIC ACID, PHENYL SALICYLATE, 4-BUTYLPHENYL-SALICYLATE, 5-CHLORO-2-HYDROXY-BENZOPHENONE, 2,4DIBENZOYL-RESORCIN, PHENOL AND PYROGALLIC ACID, OF AT LEAST ONE INORGANIC COLLOIDAL SUBSTANCE IN AN AMOUNT OF 1.151.70 TIMES THE WEIGHT OF SAID RESINOUS SUBSTANCE PLUS SAID PLASTICIZER AND SELECTED FROM THE GROUP CONSISTING OF BENTONITE, KAOLIN, CALCIUM CARBONATE, CALCIUM SULFATE, CALCIUM PHOSPHATE AND ZINC OXIDE, AND OF A PIGMENT, AND PROVIDED ON THE OTHER FACE THEREOF WITH A TAKE-UP LAYER SENSITIVE TO AND ADAPTED TO RECEIVE IMPRESSIONS OF SAID TRANSFER LAYER, SAID TAKE-UP LAYER CONSISTING ESSENTIALLY OF A DRIED RESINOUS SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF VINYL POLYMERS, ETHYL CELLULOSE, BENZYL CELLULOSE, METHYL CELLULOSE, CARBOXYMETHYL CELLULOSE, POLYDIOLEFINES, DIOLEFINE-STYRENE MIXED POLYMERS, POLYCARBONATES, COLOPHONIUM, COPAL, ABIETIC-MALEIC RESINS AND CUMARONE RESINS, AND OF AN EFFECTIVE AMOUNT OF AT LEAST ONE PLASTICIZER IN WHICH SAID RESINOUS SUBSTANCE IS SOLUBLE, WHEREBY SAID TAKE-UP LAYER OF THE TYPE DESCRIBED IS ADAPTED TO TRANSFER IMPRESSIONS THERETO. 